Stephen wrote:
> It keeps the mind young and flexible switching between co-ordinate systems.
> Actually I find that Moray’s Z is up system is more intuitive, for me. But
> then I’ve been told that, I have some wires crossed in my head :-)

It's the difference between whether you're introduced to 3D via CAD or 
via 'math'.  Architectural design uses XY as the floorplan plane, so Z 
becomes up, while math uses cartesian coordinates XY as relative to 
view-plane.  Clearly, the architectural method is superior, (wink) as it 
isn't dependent on individual point of view.

-- 
Tim Cook
http://home.bellsouth.net/p/PWP-empyrean

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